For how many years have you been working
with physical servers that are starving your database of the memory
necessary to deploy important new performance features such as the Result
Cache, Memoptimize Pool, In-Memory Aggregation, In-Memory Column Store, and
Full Database Caching? Too long? Contact me to learn how to improve all
queries ... not just some queries.

Purpose

Assumes that a primary database and one or more Data Guard physical standby databases are deployed. The databases should be at least mounted or open before block comparison is run.